Require a cloud-based WMS with real-time inventory, API or EDI carrier integrations, SLA-backed picking/packing times, kitting and value-add services, slotting for SKU velocity, and support for reverse logistics and returns processing. Confirm reporting cadence and access to operational KPIs.

Close access to Ningbo and Shanghai ports plus freight rail and highways shortens inland drayage and rail transit, reducing lead times and demurrage risk. This lowers landed cost by cutting inland transportation spend and enabling consolidated cross-dock strategies for export shipments.

Model storage density (racking vs. floor), average handling time per pick, labor productivity rates, peak-season labor surcharges, energy and utility costs for climate-controlled storage, and any minimum monthly charges or pallet-in/pallet-out fees that affect total landed unit cost.

Verify the 3PL’s bonded warehouse status, experience with export processing zones, customs broker partnerships, ability to manage duty deferment, and procedures for inward/outward processing. Ensure clear documentation workflows and electronic data exchange for customs clearance.